79851616 has 48 divisors (see below), whose sum is σ = 175165200. Its totient is φ = 35578368.

The previous prime is 79851593. The next prime is 79851643. The reversal of 79851616 is 61615897.

It is a happy number.

It is a super-2 number, since 2×79851616² = 12752561155622912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8755 + ... + 15373.

It is an arithmetic number, because the mean of its divisors is an integer number (3649275).

Almost surely, 2^79851616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79851616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87582600).

79851616 is an abundant number, since it is smaller than the sum of its proper divisors (95313584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79851616 is a wasteful number, since it uses less digits than its factorization.

79851616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6671 (or 6663 counting only the distinct ones).

The product of its digits is 90720, while the sum is 43.

The square root of 79851616 is about 8935.9731423052. The cubic root of 79851616 is about 430.6203700975.

The spelling of 79851616 in words is "seventy-nine million, eight hundred fifty-one thousand, six hundred sixteen".